During a close pass by Jupiter last February, the Juno spacecraft caught Ganymede’s shadow on the planet. The spacecraft was about 71,000 km above the cloud tops, only 6 to 7 % the distance between Jupiter and Ganymede.
An observer inside the oval shadow on Jupiter’s cloud tops would see a total eclipse of the Sun. Jupiter has four large moons (Ganymede, Io, Callisto, and Europa) that often pass between Jupiter and the Sun, so the moon shadows are often fall on the planet.
This animation provides auditory and visual presentations of data collected by the Juno spacecraft’s Waves instrument during a flyby of the Jovian moon Ganymede. The animation is shorter than the duration of the flyby because the Waves data is edited onboard to reduce telemetry requirements.
The abrupt change to higher frequencies around the midpoint of the recording occurs as the spacecraft moves from one region of Ganymede’s magnetosphere to another. The actual frequency range of the data is from 10 to 50 kHz. The animation audio has been shifted to a lower range audible to human ears.
This image was taken by the Juno spacecraft as it was moving away from the closest approach to the Jupiter on its 10th orbit around the planet. It was a bit more than 100,000 km above the cloud tops and almost directly over the South Pole when the image was taken last December.
This animation takes the viewer on a simulated journey into Jupiter’s exotic high-altitude electrical storms. It was assembled from an image of from the Juno spacecraft and computer animation. The second video explains what we think causes these storms.
On 26 December, 2019, the Juno spacecraft’s orbit around Jupiter brought it near the north pole of the ninth-largest object in the solar system, the moon Ganymede. The spacecraft’s Jovian Infrared Auroral Mapper (JIRAM) instrument took the first infrared images of the massive moon’s north pole.
Ganymede only moon in the solar system that is larger than the planet Mercury. It’s mostly water ice. It is also the only moon in the solar system with its own magnetic field. On Earth, the magnetic field provides a pathway for plasma (charged particles from the Sun) to enter our atmosphere and create aurora. Ganymede has no atmosphere to impede the progress of those charged particle, so the surface at its poles is constantly being bombarded by plasma from Jupiter’s gigantic magnetosphere. The bombardment has a dramatic effect on Ganymede’s ice.
The ice near both poles of the moon is amorphous. This is cause by the impact of the plasma on the surface. That pounding prevents the ice from having a crystalline structure.
The Juno spacecraft took this image of Jupiter’s northern latitudes during a close approach 17 February, 2020. Two long, thin bands run through the center of the image from top to bottom. Juno has observed these streaks since its first close pass over Jupiter in 2016. They are layers of haze particles floating above the cloud. We’re unsure of what these hazes are made of, or how they form. (There are no known SUVs on Jupiter.) There’s been speculation that jet streams in the planet’s atmospher may influence the formation of the hazes.
Image Credit: NASA / JPL / SwRI / MSSS
image processing by Gerald Eichstädt
This animation illustrates Jupiter’s magnetic field at a single moment in time. The Great Blue Spot, an-invisible-to-the-eye concentration of magnetic field near the equator, stands out as a particularly strong feature. The gray lines (called field lines) show the field’s direction in space, and the depth of the color on the planet’s surface corresponds to the strength of the magnetic field. Dark red and dark blue correspond to strong positive and strong negative fields, respectively).
This sequence of images was taken on 29 October as the Juno spacecraft performed its 16th close flyby of Jupiter. Juno was between 18,400 and 51,000 km the planet’s cloud tops. A cloud in the shape of a dolphin appears to be swimming through the cloud bands along the South South Temperate Belt.
Image Credits: NASA / JPL-Caltech /SwRI / MSSS / Brian Swift / Seán Doran
This color-enhanced image was taken by the Juno spacecraft as it made its 16th close flyby of Jupiter. It was taken about 7,000 km above the cloud tops at a latitude around 40° N. The picture shows several bright-white “pop-up” clouds as well as an anticyclonic storm, known as a white oval.
The Juno spacecraft is in obit around Jupiter. Here’s simulation of what it’s view of Jupiter and the planet’s moon looked like yesterday afternoon.The simulation was generated using an App called NASA Eye’s which can be downloaded here. The app isn’t limited to just following the Juno mission.
This extraordinary view of Jupiter was captured the Juno spacecraft as it moved away form the planet after twelfth close flyby..
Seeing Jupiter from the this far south causes the Great Red Spot to appear as if it is in Jupter’s north. It isn’t, but this new perspective demonstrates how different our view is when we step off the Earth and discover the three-dimensional nature of the Universe.
Data collected by the Juno spacecraft has provided information on the dynamo powering Jupiter’s magnetic field. Red areas in this animation show where magnetic field lines emerge from the planet. Blue areas show where they return.